Heteronyx sydneyanus is a species of beetle of the family Scarabaeidae. It is found in Australia (New South Wales).
Description Adults reach a length of about . They are testaceous. The clypeus has a smooth, unpunctured area and the disc of the pronotum is densely . Both the pronotum and elytra are covered with short setae, with a few long setae at the apical declivity.
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